Composite backfilling equipment for building foundation pit

Abstract

This application provides a composite material backfilling device for building foundation pits, including a movable base, a lifting platform, multiple combing components, and a synchronous transmission structure. The movable base has a material collection chamber and a discharge port on its bottom surface. A discharge pipe is rotatably connected to the lower side of the movable base, communicating with the discharge port and having its lower end inclined. The lifting platform is slidably mounted on the movable base, located behind the discharge pipe, and a pressure roller is rotatably connected to the lifting platform. The outer wall of the pressure roller is used to contact the backfilling area to compact the composite material in the backfilling area and rotate synchronously with the movement of the movable base. Multiple combing components are arranged side by side in front of the lifting platform and are used to move synchronously left and right when the movable base moves back and forth under the drive of the synchronous transmission structure to spread the composite material in the backfilling area. The composite material backfilling device for building foundation pits provided by this application improves the uniformity of backfill material distribution in the backfilling area, achieves a horizontal filling surface, and avoids the formation of backfill blind spots.

Description

Technical Field

[0001] This application belongs to the field of foundation pit backfilling technology, specifically relating to a composite material backfilling device for building foundation pits. Background Technology

[0002] A building foundation pit is a temporary space excavated for the construction of underground structures such as building foundations, basements, and municipal pipelines. After construction is completed, the gaps between the pit sidewalls and the underground structures need to be filled and compacted in layers to restore the ground bearing capacity, protect the underground structures, and prevent uneven settlement. For this purpose, a composite material made of undisturbed soil and stone chips (hereinafter referred to as "backfill material") is usually used for backfilling.

[0003] In existing technologies, backfilling equipment typically consists of a movable chassis and a storage silo and discharge pipe fixed to the chassis. During operation, the composite material is loaded into the storage silo and guided down into the foundation pit through the discharge pipe.

[0004] The fixed position of the discharge pipe of the aforementioned backfilling equipment causes the composite material to fall in a concentrated, single-point manner, making it impossible to achieve uniform distribution within the foundation pit. This easily leads to uneven accumulation of the filler material. In other words, localized backfilling blind spots may form due to material shortages, requiring subsequent secondary leveling operations. This not only increases the number of construction steps but also significantly reduces backfilling efficiency and quality, making it difficult to meet the requirements of continuous construction. Summary of the Invention

[0005] This application provides a composite material backfilling device for building foundation pits, which aims to improve the uniformity of backfill material distribution, achieve a horizontal fill surface, and avoid the formation of backfill blind spots.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: A composite material backfilling device for building foundation pits is provided, comprising: A movable seat is used to move back and forth above the backfill area; the movable seat has a material collection chamber and a discharge port communicating with the material collection chamber is opened on the bottom surface; a discharge pipe is rotatably connected to the lower side of the movable seat, the rotation axis of the discharge pipe extends in the vertical direction, and the end of the discharge pipe away from the discharge port is open and inclined relative to the vertical direction. A lifting platform is slidably mounted on the movable seat in the vertical direction and is located behind the discharge pipe; a pressure roller is rotatably connected to the lifting platform, and the outer wall of the pressure roller is used to contact the backfill area so that when the movable seat moves, the pressure roller compacts the composite material in the backfill area and rotates synchronously. Multiple combing components are arranged side-by-side in front of the lifting platform in a left-right direction. Each combing component is slidably connected to the lifting platform in the left-right direction, and when the pressure roller contacts the backfill area, a designed material spreading gap is formed between the bottom surface of each combing component and the backfill area; and A synchronous transmission structure is disposed between the pressure roller and the combing component; when the pressure roller rotates, the synchronous transmission structure is used to drive each of the combing components to reciprocate in the left-right direction, so as to spread the composite material in the backfill area in the left-right direction.

[0007] In one possible implementation, a first helical gear is fixedly connected to the discharge pipe, and the central axis of the first helical gear is parallel to the vertical direction; a transmission roller is rotatably connected to the lower side of the movable seat, and a second helical gear that meshes with the first helical gear is coaxially connected to the transmission roller. The transmission roller is connected to a rotating motor; when the rotating motor drives the transmission roller to rotate, the discharge pipe rotates synchronously.

[0008] In one possible implementation, a filter plate is vertically mounted inside the collection chamber, and the filter plate divides the collection chamber into a feeding chamber and a discharging chamber; the filter plate is connected to the movable seat through an elastic reset member, and the elastic reset member is used to drive the filter plate to move downward. A force transmission roller is rotatably installed in the feeding chamber. One end of the force transmission roller passes through the movable seat and extends out, and is connected to the transmission roller through a transmission belt, so that the force transmission roller rotates synchronously when the transmission roller rotates. The force transmission roller has multiple convex shafts arranged along the axial direction; when the force transmission roller rotates, each of the convex shafts can abut against the filter plate, so that the filter plate moves upward, and the elastic reset member undergoes elastic deformation simultaneously.

[0009] In one possible implementation, the filter plate includes: A lifting frame is vertically and vertically disposed within the material collection chamber; the lifting frame has a horizontally extending crossbeam at its center, the extension direction of the crossbeam being parallel to the axial direction of the force transmission roller, and each of the convex shafts abutting against the crossbeam when the force transmission roller rotates; and Two filter screens are installed inside the lifting frame and are located on both sides of the crossbeam. The upper side of the crossbeam has a guide section that extends upward and has a conical structure.

[0010] In one possible implementation, the movable seat is provided with a rearwardly extending mounting plate; an upwardly extending guide rod is connected to the lifting platform, and the guide rod is slidably connected to the mounting plate in the vertical direction. A linear cylinder is fixedly mounted on the mounting plate, and the power output end of the linear cylinder is connected to the lifting platform via a transmission connection.

[0011] In one possible implementation, the front side of the lifting platform has a guide shell that extends in the left-right direction and is open downwards. The guide shell is fixedly connected to the lifting platform via a connecting arm so as to lift and lower synchronously. The upper end of each comb component is slidably embedded in the guide shell, and the lower end extends to the lower side of the guide shell.

[0012] In one possible implementation, the guide housing has multiple reciprocating screws arranged coaxially in the left-right direction and corresponding to multiple combing components, and adjacent reciprocating screws are connected by a coupling. Each of the combing components is fixedly connected to a transmission nut, which is threadedly engaged with the corresponding reciprocating lead screw. At least one of the reciprocating lead screws at the end extends out of the guide housing and is connected to the pressure roller via a synchronous belt, so that the reciprocating lead screw rotates synchronously when the pressure roller rotates.

[0013] In one possible implementation, the inner bottom surface of the collecting chamber is a concave surface that is recessed toward the discharge port; The bottom surface of the movable seat is detachably connected to a buffer tube that communicates with the discharge port. The buffer tube is made of elastic material and has an inner diameter that gradually decreases from top to bottom. The upper end of the discharge tube is rotatably connected to the lower end of the buffer tube.

[0014] In one possible implementation, the bottom surface of the movable seat has two sets of positioning elements symmetrically arranged in the left-right direction; Each group of positioning elements includes multiple positioning arms arranged side by side in the front-back direction, and each positioning arm extends outward in the left-right direction to the outside of the movable seat; The positioning arm has a support leg slidably connected to it on its lower side, and each support leg is rotatably connected to a roller at its bottom end. The roller is used to support the ground outside the backfill area.

[0015] In one possible implementation, the positioning arm has a plurality of positioning holes arranged in the left-right direction, and the upper end of the support leg has a slot suitable for communicating with any one of the positioning holes. The positioning arm also has a limiting rod adapted to be inserted into any of the positioning holes, the limiting rod being adapted to be inserted into the slot to limit the horizontal movement of the leg relative to the positioning arm.

[0016] The beneficial effects of the composite material backfilling equipment for building foundation pits provided in this application are as follows: A discharge pipe, rotatably connected to the lower side of the moving base and with its lower end angled, allows the discharge direction to change as the pipe rotates around its vertical axis. This disperses the composite material across different locations within the backfill area, preventing it from concentrating at a single point. A synchronous drive structure, as the pressure roller rotates with the moving base, drives multiple combing components to reciprocate left-right. This ensures the composite material, already in the backfill area, is evenly spread out in the left-right direction under the push of the combing components. The spread thickness is controlled by pre-setting the designed gap between the bottom surface of the combing components and the backfill area. Finally, the pressure roller compacts the spread composite material, forming a continuous sequence of "discharge, spread, and compaction."

[0017] By adopting the above technical solution, the following beneficial effects can be achieved: (i) The discharge pipe can rotate around the vertical axis, so that the discharge direction can be adjusted in the horizontal plane. The landing point of the composite material in the backfill area can be dispersed, reducing the phenomenon of concentrated accumulation at a single point, and providing a basic condition for subsequent uniform material distribution.

[0018] (ii) The combing component moves back and forth in the left and right direction under the drive of the pressure roller, pushing the composite material that has fallen into the backfill area to both sides, making the backfill material more evenly distributed in the width direction, reducing local material shortages or accumulations caused by uneven distribution, avoiding the formation of backfill blind spots, and eliminating the need for a secondary leveling process.

[0019] (iii) After the material is laid out, the pressure roller immediately compacts it. The combing component and the pressure roller are linked through a synchronous transmission structure. There is no need to configure a separate drive power source for the combing component, which simplifies the equipment structure and reduces energy consumption.

[0020] (iv) The three actions of material dropping, spreading and compaction are completed continuously during one movement of the moving seat, reducing the interruption and switching of construction links and improving the continuity and efficiency of backfilling operations.

[0021] Compared with the prior art, the composite material backfilling equipment for building foundation pits provided in this application, through the integrated design of material dispersing and dropping through the discharge pipe, reciprocating material spreading through the comb and synchronous compaction by the pressure roller, completes the dispersion, leveling and compaction of backfill material in a single pass, reduces the secondary leveling process caused by concentrated material dropping at a single point, improves the uniformity of material distribution in the backfill area, and avoids the formation of backfill blind spots. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional structural diagram of the composite material backfilling equipment for building foundation pits provided in the embodiments of this application; Figure 2 for Figure 1 A magnified view of a portion of the middle circle A; Figure 3 for Figure 1 Side view; Figure 4 For along Figure 3 Cross-sectional view of the middle BB line; Figure 5 for Figure 3 A magnified view of a portion of the middle circle C; Figure 6 This is a schematic diagram of the movable seat and buffer tube used in the embodiments of this application under an explosion state; Figure 7 This is a partially enlarged schematic diagram of the movable base and buffer tube used in the embodiments of this application under an explosive state; Figure 8 This is a schematic diagram of the combined structure of the buffer tube and discharge tube used in the embodiments of this application; Figure 9 This is a schematic diagram of the combined structure of the drive roller and discharge pipe used in the embodiments of this application; Figure 10 This is a cross-sectional view of the movable base and filter plate used in the embodiments of this application in a combined state; Figure 11 This is a three-dimensional structural diagram of the filter plate used in the embodiments of this application; Figure 12 This is a schematic diagram of the combined structure of the drive roller and the force transmission roller used in the embodiments of this application; Figure 13 This is a three-dimensional structural diagram of the force transmission roller used in the embodiments of this application; Figure 14 This is a cross-sectional view of the elastic reset member used in the embodiments of this application; Figure 15 This is a three-dimensional structural diagram of the mounting plate, lifting platform, and guide shell used in the embodiments of this application in a combined state; Figure 16 This is a three-dimensional structural diagram of the comb and reciprocating screw used in the embodiments of this application in a combined state; Figure 17 This is a cross-sectional view of the guide shell, comb component, and synchronous transmission structure used in the embodiments of this application in a combined state; Figure 18 for Figure 17 A magnified view of a portion of the middle circle at point D; Figure 19This is an exploded view of the transmission nut and comb used in the embodiments of this application; Figure 20 This is an exploded view of the positioning arm and outriggers used in the embodiments of this application; Explanation of reference numerals in the attached drawings: 1. Moving seat; 11. Collecting chamber; 111. Feeding chamber; 112. Discharging chamber; 12. Discharge port; 13. Discharge pipe; 131. First helical gear; 14. Transmission roller; 141. Second helical gear; 15. Force transmission roller; 151. Cam shaft; 16. Transmission belt; 17. Mounting plate; 18. Buffer pipe; 2. Lifting platform; 21. Pressure roller; 22. Guide rod; 3. Combing component; 4. Synchronous transmission... 41. Moving structure; 41. Reciprocating lead screw; 411. Coupling; 412. Synchronous belt; 42. Transmission nut; 5. Filter plate; 51. Lifting frame; 511. Crossbeam; 512. Material guide; 52. Filter screen; 6. Elastic reset component; 7. Guide shell; 71. Connecting arm; 8. Positioning arm; 81. Positioning hole; 82. Limiting rod; 9. Support leg; 91. Slot; 92. Roller; 10. Rotary motor; 20. Linear cylinder. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0025] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0026] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0028] Please refer to the following: Figures 1 to 20 The present application describes the composite material backfilling equipment for building foundation pits. This equipment is mainly used for backfilling operations of building foundation pits. It can continuously and uniformly backfill composite materials (such as cement-based materials, foamed concrete, fluidized solidified soil, etc.) into foundation pits or trenches, and simultaneously complete material placement, leveling and compaction during the backfilling process. It is suitable for various foundation pit backfilling scenarios such as municipal engineering and building foundations.

[0029] The composite material backfilling equipment for building foundation pits proposed in this application includes a movable base 1, a lifting platform 2, multiple combing components 3, and a synchronous transmission structure 4.

[0030] The movable seat 1 is used to move horizontally above the backfill area; in this embodiment, for ease of description, as follows... Figure 1 As shown, the moving direction of the movable seat 1 is defined as the forward and backward direction.

[0031] The movable seat 1 has a material collection chamber 11 inside, which is used to store composite materials or to gradually add composite materials in batches as the equipment is used. In this embodiment, the upper end face of the movable seat 1 has an open structure for adding material into the material collection chamber 11.

[0032] In addition, a discharge port 12 is provided on the bottom surface of the movable seat 1, which is connected to the collection chamber 11 to discharge the material in the collection chamber 11. Based on this, a discharge pipe 13 is rotatably connected to the lower side of the movable seat 1. The rotation axis of the discharge pipe 13 extends in the vertical direction, and the end of the discharge pipe 13 away from the discharge port 12 is open and inclined relative to the vertical direction, so that the composite material can fall into the backfill area at a certain angle when leaving the discharge pipe 13, rather than falling vertically.

[0033] The lifting platform 2 is slidably mounted on the movable seat 1 in the vertical direction and is located behind the discharge pipe 13. A pressure roller 21 is rotatably connected to the lifting platform 2. The outer wall of the pressure roller 21 is used to contact the backfill area so that when the movable seat 1 moves forward, the pressure roller 21 rotates synchronously under the action of friction and applies a compaction effect to the spread composite material.

[0034] Multiple combing components 3 are arranged side by side in front of the lifting platform 2 in the left-right direction, and each combing component 3 is slidably connected to the lifting platform 2 in the left-right direction. When the pressure roller 21 comes into contact with the backfill area, a designed material spreading gap is formed between the bottom surface of each combing component 3 and the backfill area. The size of this gap determines the thickness of the composite material that is spread out.

[0035] The synchronous transmission structure 4 is set between the pressure roller 21 and the combing component 3. When the pressure roller 21 rotates, the synchronous transmission structure 4 is used to drive each combing component 3 to move back and forth in the left and right direction so as to spread the composite material in the backfill area in the left and right direction.

[0036] During backfilling, the discharge pipe 13 rotates continuously, its lower end constantly changing orientation in the horizontal plane, ensuring the composite material is dispersed to a certain extent in both the length and width directions of the backfill area. After the composite material is dispersed and falls into the backfill area through the discharge pipe 13, it moves forward with the moving seat 1. Multiple combing components 3 reciprocate in the left-right direction under the drive of the synchronous transmission structure 4, pushing the fallen composite material to spread evenly on both sides. The designed spreading gap between the bottom surface of the combing component 3 and the backfill area is used to control the spreading thickness, avoiding excessively thick or thin spreading. Subsequently, the pressure roller 21 rolls forward under the drive of the moving seat 1, applying a compaction effect to the spread composite material to achieve the designed density. The rotation of the discharge pipe 13, the reciprocating spreading of the combing component 3, and the rolling compaction of the pressure roller 21 work together and are completed sequentially during one movement of the moving seat 1.

[0037] The movable seat 1 can move back and forth in the front and back direction above the backfill area. When the movable seat 1 moves forward, it can drop, spread and compact the material. When it moves backward, it can perform additional compaction. Through multiple round trips, the backfill area can be filled layer by layer to the design elevation.

[0038] The beneficial effects of the composite material backfilling equipment for building foundation pits provided in this application are as follows: The discharge pipe 13 is rotatably connected to the lower side of the moving seat 1, with its lower end inclined. This allows the discharge pipe 13 to change its discharge direction as it rotates around the vertical axis, thus dispersing the composite material to different locations in the backfill area, rather than concentrating it at a single point. The synchronous transmission structure 4 drives multiple combing components 3 to reciprocate left and right as the pressure roller 21 rotates with the moving seat 1. This causes the composite material that has fallen into the backfill area to be evenly spread out in the left and right direction under the push of the combing components 3. The spreading thickness is controlled by pre-controlling the designed spreading gap between the bottom surface of the combing components 3 and the backfill area. Finally, the pressure roller 21 compacts the spread composite material, forming a continuous operation sequence of "discharge, spreading, and compaction."

[0039] By adopting the above technical solution, the following beneficial effects can be achieved: (a) The discharge pipe 13 can rotate around the vertical axis, so that the discharge direction can be adjusted in the horizontal plane. The landing point of the composite material in the backfill area is dispersed, reducing the phenomenon of concentrated accumulation at a single point, and providing a basic condition for subsequent uniform material distribution.

[0040] (ii) The combing component 3 moves back and forth in the left and right direction under the drive of the pressure roller 21, pushing the composite material that has fallen into the backfill area to both sides, making the backfill material more evenly distributed in the width direction, reducing local material shortages or accumulations caused by uneven distribution, avoiding the formation of backfill blind areas, and eliminating the need for a secondary leveling process.

[0041] (iii) After the material is laid, the pressure roller 21 immediately compacts it. The combing component 3 and the pressure roller 21 are linked through the synchronous transmission structure 4. There is no need to configure a separate drive power source for the combing component 3, which simplifies the equipment structure and reduces energy consumption.

[0042] (iv) The three actions of material dropping, spreading and compacting are completed continuously during the movement of the moving seat 1, reducing the interruption and switching of construction links and improving the continuity and efficiency of backfilling operations.

[0043] Compared with the prior art, the composite material backfilling equipment for building foundation pits provided in this application, through the integrated design of material discharge pipe 13 dispersing material drop, combing component 3 reciprocating material spreading and pressure roller 21 synchronously compacting, completes the dispersion, leveling and compaction of backfill material in a single pass, reduces the secondary leveling process caused by concentrated material drop at a single point, improves the uniformity of material distribution in the backfill area, and avoids the formation of backfill blind spots.

[0044] In some embodiments, such as Figure 4 and Figure 9 As shown, a first helical gear 131 is fixedly connected to the discharge pipe 13, and the central axis of the first helical gear 131 is parallel to the vertical direction.

[0045] Correspondingly, a transmission roller 14 is rotatably connected to the lower side of the movable seat 1, and a second helical gear 141 that meshes with the first helical gear 131 is coaxially connected to the transmission roller 14.

[0046] A rotating motor 10 is connected to the transmission roller 14; when the rotating motor 10 drives the transmission roller 14 to rotate, the second helical gear 141 drives the first helical gear 131 to rotate, thereby causing the discharge pipe 13 to rotate synchronously.

[0047] Since the rotational speed of the rotating motor 10 is adjustable, the rotational speed of the discharge pipe 13 can also be changed accordingly, thus enabling the equipment to adapt to different material feeding speed requirements. Furthermore, the meshing method of the first helical gear 131 and the second helical gear 141 changes the power transmission direction from the horizontal axis to the vertical axis, resulting in a compact structure suitable for arrangement in the limited space below the moving base 1.

[0048] In some embodiments, such as Figures 11 to 14 As shown, a filter plate 5 is installed in the collection chamber 11 and can be raised and lowered. This filter plate 5 is used to restrict the passage of materials that do not meet the size standard from above, thereby dividing the collection chamber 11 into a feeding chamber 111 and a discharging chamber 112.

[0049] The filter plate 5 is connected to the movable seat 1 through the elastic reset member 6. The elastic reset member 6 is used to drive the filter plate 5 to move downward, that is, to give the filter plate 5 an elastic degree of freedom to move downward.

[0050] A force transmission roller 15 is rotatably installed inside the feeding chamber 112. One end of the force transmission roller 15 passes through the movable seat 1 and extends out, and is connected to the transmission roller 14 through the transmission belt 16, so that when the transmission roller 14 rotates, the force transmission roller 15 rotates synchronously.

[0051] The force transmission roller 15 has multiple convex shafts 151 arranged axially. When the force transmission roller 15 rotates, each convex shaft 151 abuts against the filter plate 5, causing the filter plate 5 to move upward, and the elastic reset member 6 undergoes elastic deformation simultaneously. As the force transmission roller 15 continues to rotate, the filter plate 5 vibrates up and down under the alternating action of the elastic reset member 6 and the convex shafts 151, producing a screening and loosening effect on the composite material falling above the filter plate 5. Furthermore, the clumps of material intercepted by the filter plate 5 will gradually break up under the vibration, which is beneficial for subsequent discharge and distribution.

[0052] In some embodiments, such as Figure 10 and Figure 11 As shown, the filter plate 5 includes a lifting frame 51 and two filter screens 52.

[0053] The lifting frame 51 is vertically mounted in the material collection chamber 11. The center of the lifting frame 51 has a horizontally extending crossbeam 511. The extension direction of the crossbeam 511 is parallel to the axial direction of the force transmission roller 15. When the force transmission roller 15 rotates, each of the aforementioned convex shafts 151 can abut against the crossbeam 511 to realize the collision between rigid materials and achieve efficient and stable kinetic energy transmission.

[0054] Two filters 52 are installed inside the lifting frame 51 and are located on both sides of the crossbeam 511.

[0055] Based on the foregoing, the upper side of the crossbeam 511 has an upwardly extending and tapered guide section 512.

[0056] By adopting the above technical solution, when the composite material in the feeding chamber 111 falls onto the filter plate 5, the conical guide part 512 diverts the material to both sides, so that the material is evenly distributed on the two filter screens 52, thereby improving the filtration efficiency.

[0057] In some embodiments, such as Figure 15 As shown, the movable base 1 is provided with a rearwardly extending mounting plate 17, which is detachably connected to the movable base 1.

[0058] A guide rod 22 extending upwards is connected to the lifting platform 2, and the guide rod 22 is slidably connected to the mounting plate 17 in the vertical direction. In addition, a linear cylinder 20 is fixedly installed on the mounting plate 17, and the power output end of the linear cylinder 20 is connected to the lifting platform 2 for transmission.

[0059] By extending and retracting the linear cylinder 20, the lifting platform 2 can move up and down along the guide rod 22, thereby adjusting the height of the pressure roller 21 and the combing component 3 relative to the ground to adapt to different backfill layer thickness requirements. At the same time, since the moving base 1 and the mounting plate 17 are detachably connected, the lifting platform 2, the combing component 3 and their related structures can all be removed from the moving base 1 individually to facilitate maintenance and other operations.

[0060] In some embodiments, such as Figures 15 to 19 As shown, the front side of the lifting platform 2 has a guide shell 7 that extends in the left and right direction and is open downwards. This guide shell 7 is fixedly connected to the lifting platform 2 through a connecting arm 71 so as to lift and lower synchronously.

[0061] The upper end of each of the aforementioned combing components 3 is slidably embedded in the guide shell 7, and the lower end extends to the lower side of the guide shell 7.

[0062] The guide shell 7 provides guidance and support for the left and right sliding of the comb component 3, maintaining the stability of the comb component 3 during reciprocating motion. Furthermore, through the rigid connection of the connecting arm 71, the comb component 3 can be individually removed by disconnecting the connecting arm 71 when maintenance or repair of the comb component 3 is required.

[0063] In some embodiments, such as Figures 15 to 19 As shown, the synchronous transmission structure 4 includes multiple reciprocating lead screws 41 and multiple transmission nuts 42.

[0064] Multiple reciprocating lead screws 41 are coaxially arranged in the guide housing 7 in the left-right direction, corresponding to multiple combing parts 3; adjacent reciprocating lead screws 41 are connected by a coupling 411, which has a socket at both ends, and the two reciprocating lead screws 41 on both sides are fixedly inserted into the two sockets respectively.

[0065] Multiple transmission nuts 42 are correspondingly arranged on multiple comb components 3, and are threadedly engaged with multiple reciprocating lead screws 41.

[0066] At least one reciprocating screw 41 at the end extends out of the guide housing 7 and is connected to the pressure roller 21 via a synchronous belt 412 so that the reciprocating screw 41 rotates synchronously when the pressure roller 21 rotates.

[0067] The reciprocating screw 41 has a cross-helical groove structure, with two helical grooves on its surface that rotate in opposite directions and are smoothly connected at both ends by arc grooves. Based on this, when the reciprocating screw 41 rotates continuously in the same direction, the transmission nut 42 moves back and forth along the screw axis under the guidance of the helical grooves, achieving the reciprocating motion of the comb component 3 without changing the rotation direction of the screw. Thus, multiple comb components 3 move synchronously back and forth under the drive of their respective reciprocating screws 41, ensuring consistent material distribution.

[0068] In some embodiments, such as Figures 6 to 8 As shown, the inner bottom surface of the collecting chamber 11 is a concave surface that is recessed towards the discharge port 12, which facilitates the convergence of the composite material towards the discharge port 12 under the action of gravity.

[0069] The bottom surface of the movable seat 1 is detachably connected to a buffer tube 18 that communicates with the discharge port 12. The buffer tube 18 is made of an elastic material (such as rubber, polyurethane, etc.) and has a structure in which the inner diameter gradually decreases from top to bottom.

[0070] Based on this, the upper end of the aforementioned discharge pipe 13 is rotatably connected to the lower end of the buffer pipe 18.

[0071] In actual use, the buffer tube 18 can absorb the vibration and sway generated when the discharge tube 13 rotates to a certain extent. At the same time, its tapered structure helps the composite material to form a certain pressure before entering the discharge tube 13, which is beneficial to the continuity of discharge.

[0072] In some embodiments, such as Figures 1 to 4 As shown, the bottom surface of the movable seat 1 has two sets of positioning components symmetrically arranged in the left-right direction.

[0073] In this embodiment, each group of positioning components includes multiple positioning arms 8 arranged side by side in the front-back direction, and each positioning arm 8 extends outward in the left-right direction to the outside of the movable seat 1.

[0074] The lower side of the positioning arm 8 has a support leg 9 that is slidably connected to it. Each support leg 9 has a roller 92 rotatably connected to its bottom end. The roller 92 is used to support the ground outside the backfill area.

[0075] By adjusting the relative positions of the outriggers 9 and the positioning arm 8, the height of the movable seat 1 relative to the backfill area can be changed, thus adapting to different backfill thicknesses or changes in ground elevation. The rollers 92 enable the movable seat 1 to move as a whole along the extension direction of the backfill area, facilitating continuous operation.

[0076] In some embodiments, such as Figure 2 and Figure 20 As shown, the positioning arm 8 has multiple positioning holes 81 arranged in the left-right direction, and the upper end of the support leg 9 is provided with a slot 91 suitable for communicating with any of the positioning holes 81.

[0077] The positioning arm 8 also has a limiting rod 82 adapted to be inserted into any of the positioning holes 81, and the limiting rod 82 is also adapted to be inserted into the slot 91 to limit the horizontal movement of the leg 9 relative to the positioning arm 8.

[0078] When the height of the movable seat 1 needs to be adjusted, pull out the limiting rod 82, slide the support leg 9 to the target position, align the slot 91 with the corresponding positioning hole 81, and reinsert the limiting rod 82 to complete the locking. The insertion and engagement method between the limiting rod 82 and the positioning hole 81 is simple in structure, easy to operate, and can bear a large vertical load.

[0079] It should be further explained that the upper end of the limiting rod 82 also has a cantilever extending in the horizontal direction. This cantilever can abut against the top surface of the positioning arm 8 to limit the falling of the limiting rod 82. At the same time, the positioning arm 8 has multiple locking screws that extend upward corresponding to multiple positioning holes 81. The cantilever has a through hole through which any of the locking screws can pass, and the cantilever is also equipped with a locking nut that can be threadedly connected to the locking screw to limit the upward movement of the cantilever relative to the positioning arm 8.

[0080] The above content is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A composite material backfilling device for building foundation pits, characterized in that, include: A movable seat is used to move back and forth above the backfill area; the movable seat has a material collection chamber and a discharge port communicating with the material collection chamber is opened on the bottom surface; a discharge pipe is rotatably connected to the lower side of the movable seat, the rotation axis of the discharge pipe extends in the vertical direction, and the end of the discharge pipe away from the discharge port is open and inclined relative to the vertical direction. A lifting platform is slidably mounted on the movable seat in the vertical direction and is located behind the discharge pipe; a pressure roller is rotatably connected to the lifting platform, and the outer wall of the pressure roller is used to contact the backfill area so that when the movable seat moves, the pressure roller compacts the composite material in the backfill area and rotates synchronously. Multiple combing components are arranged side-by-side in front of the lifting platform in a left-right direction. Each combing component is slidably connected to the lifting platform in the left-right direction, and when the pressure roller contacts the backfill area, a designed material spreading gap is formed between the bottom surface of each combing component and the backfill area; and A synchronous transmission structure is disposed between the pressure roller and the combing component; when the pressure roller rotates, the synchronous transmission structure is used to drive each of the combing components to reciprocate in the left-right direction, so as to spread the composite material in the backfill area in the left-right direction.

2. The composite material backfilling equipment for building foundation pits as described in claim 1, characterized in that, A first helical gear is fixedly connected to the discharge pipe, and the central axis of the first helical gear is parallel to the vertical direction; a transmission roller is rotatably connected to the lower side of the movable seat, and a second helical gear that meshes with the first helical gear is coaxially connected to the transmission roller. The transmission roller is connected to a rotating motor; when the rotating motor drives the transmission roller to rotate, the discharge pipe rotates synchronously.

3. The composite material backfilling equipment for building foundation pits as described in claim 2, characterized in that, A filter plate is vertically mounted inside the material collection chamber, which divides the material collection chamber into a feeding chamber and a discharging chamber. The filter plate is connected to the movable seat via an elastic reset member, which is used to drive the filter plate to move downward. A force transmission roller is rotatably installed in the feeding chamber. One end of the force transmission roller passes through the movable seat and extends out, and is connected to the transmission roller through a transmission belt, so that the force transmission roller rotates synchronously when the transmission roller rotates. The force transmission roller has multiple convex shafts arranged along the axial direction; when the force transmission roller rotates, each of the convex shafts can abut against the filter plate, so that the filter plate moves upward, and the elastic reset member undergoes elastic deformation simultaneously.

4. The composite material backfilling equipment for building foundation pits as described in claim 3, characterized in that, The filter plate includes: A lifting frame is vertically and vertically disposed within the material collection chamber; the lifting frame has a horizontally extending crossbeam at its center, the extension direction of the crossbeam being parallel to the axial direction of the force transmission roller, and each of the convex shafts abutting against the crossbeam when the force transmission roller rotates; and Two filter screens are installed inside the lifting frame and are located on both sides of the crossbeam. The upper side of the crossbeam has a guide section that extends upward and has a conical structure.

5. The composite material backfilling equipment for building foundation pits as described in claim 1, characterized in that, The movable seat is provided with a rearwardly extending mounting plate; the lifting platform is connected to an upwardly extending guide rod, and the guide rod is slidably connected to the mounting plate in the vertical direction. A linear cylinder is fixedly mounted on the mounting plate, and the power output end of the linear cylinder is connected to the lifting platform via a transmission connection.

6. The composite material backfilling equipment for building foundation pits as described in claim 1 or 5, characterized in that, The front side of the lifting platform has a guide shell that extends in the left-right direction and faces downward. The guide shell is fixedly connected to the lifting platform through a connecting arm so as to lift and lower synchronously. The upper end of each comb component is slidably embedded in the guide shell, and the lower end extends to the lower side of the guide shell.

7. The composite material backfilling equipment for building foundation pits as described in claim 6, characterized in that, The synchronous transmission structure includes: Multiple reciprocating lead screws are coaxially arranged in the guide housing along the left-right direction, corresponding to multiple combing components; adjacent reciprocating lead screws are connected by a coupling. Multiple transmission nuts are correspondingly disposed on multiple comb components and are threadedly engaged with multiple reciprocating lead screws; At least one of the reciprocating lead screws at the end extends out of the guide housing and is connected to the pressure roller via a synchronous belt, so that the reciprocating lead screw rotates synchronously when the pressure roller rotates.

8. The composite material backfilling equipment for building foundation pits as described in claim 1, characterized in that, The inner bottom surface of the material collection chamber is a concave surface that is recessed towards the discharge port; The bottom surface of the movable seat is detachably connected to a buffer tube that communicates with the discharge port. The buffer tube is made of elastic material and has an inner diameter that gradually decreases from top to bottom. The upper end of the discharge tube is rotatably connected to the lower end of the buffer tube.

9. The composite material backfilling equipment for building foundation pits as described in claim 1, characterized in that, The bottom surface of the movable seat has two sets of positioning elements symmetrically arranged in the left-right direction; Each group of positioning elements includes multiple positioning arms arranged side by side in the front-back direction, and each positioning arm extends outward in the left-right direction to the outside of the movable seat; The positioning arm has a support leg slidably connected to it on its lower side, and each support leg is rotatably connected to a roller at its bottom end. The roller is used to support the ground outside the backfill area.

10. The composite material backfilling equipment for building foundation pits as described in claim 9, characterized in that, The positioning arm has multiple positioning holes arranged in the left-right direction, and the upper end of the support leg is provided with a slot suitable for communicating with any one of the positioning holes. The positioning arm also has a limiting rod adapted to be inserted into any of the positioning holes, the limiting rod being adapted to be inserted into the slot to limit the horizontal movement of the leg relative to the positioning arm.

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